LGTM to extend to 139. I see a draft spec, completed TAG review, signals
requests sent in 2024-05, and fairly comprehensive WPTs.

On Wed, May 7, 2025 at 5:45 PM Keita Suzuki <suzukike...@chromium.org>
wrote:

> Contact emailssuzukike...@chromium.org, yyanagis...@chromium.org
>
> Explainer
> https://github.com/WICG/service-worker-static-routing-api/blob/main/resource-timing-api.md
>
> SpecificationDraft ServiceWorker spec change:
> https://github.com/w3c/ServiceWorker/pull/1769
>
> Summary
>
> Adds timing information for ServiceWorker Static routing API, exposed in
> navigation timing API and resource timing API for developer use. Service
> Worker provides timing information to mark certain points in time. We add
> two Static routing API-relevant timing information: RouterEvaluationStart,
> time to start matching a request with registered router rules, and
> CacheLookupStart, time to start looking up the cache storage if the source
> is "cache". In addition, we also add two router source information, the
> matched router source and the final router source.
>
>
> Blink componentBlink>ServiceWorker
> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EServiceWorker%22>
>
> TAG reviewhttps://github.com/w3ctag/design-reviews/issues/958
>
> TAG review statusIssues addressed
>
> Origin Trial NameTiming Info for ServiceWorker static routing API
>
> Chromium Trial NameServiceWorkerStaticRouterTimingInfo
>
> Origin Trial documentation link
> https://github.com/WICG/service-worker-static-routing-api/blob/main/resource-timing-api.md
>
> WebFeature UseCounter name
> kV8PerformanceResourceTiming_WorkerRouterEvaluationStart_AttributeGetter
>
> Risks
>
>
> Interoperability and Compatibility
>
> None
>
>
> *Gecko*: No signal (
> https://github.com/mozilla/standards-positions/issues/1031)
>
> *WebKit*: No signal (
> https://github.com/WebKit/standards-positions/issues/354)
>
> *Web developers*: No signals
>
> *Other signals*:
>
> WebView application risks
>
> Does this intent deprecate or change behavior of existing APIs, such that
> it has potentially high risk for Android WebView-based applications?
>
> None
>
>
> Goals for experimentation
>
>
>
> Reason this experiment is being extended
>
> Upon community feedback, we got the response that they want to extend the
> Origin Trial to third parties to evaluate further on the feature. We would
> like to have additional milestones for the third party-enabled origin
> trials and gather further feedback. Also, we haven't got enough feedback
> from partners yet as some minor issues had blocked partner OT
> participation, but now they are ready to try. Since the original OT
> request, we have made progress on WPT test changes and started drafting a
> spec change in the Service Worker spec and the Resource timing spec.
>
>
> Ongoing technical constraints
>
> None
>
>
> Debuggability
>
> None
>
>
> Will this feature be supported on all six Blink platforms (Windows, Mac,
> Linux, ChromeOS, Android, and Android WebView)?Yes
>
> Is this feature fully tested by web-platform-tests
> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
> ?Yes
>
>
> https://wpt.fyi/results/service-workers/service-worker/tentative/static-router/static-router-resource-timing.https.html?label=experimental&label=master&aligned
>
>
> Flag name on about://flagsNone
>
> Finch feature nameServiceWorkerStaticRouterTimingInfo
>
> Requires code in //chrome?False
>
> Tracking bughttps://crbug.com/41496865
>
> Estimated milestones
> Origin trial desktop first 131
> Origin trial desktop last 136
> Origin trial extension 1 end milestone 139
> Origin trial Android first 131
> Origin trial Android last 136
> Origin trial WebView first 131
> Origin trial WebView last 136
>
> Link to entry on the Chrome Platform Status
> https://chromestatus.com/feature/6309742380318720?gate=6423312582049792
>
> Links to previous Intent discussionsIntent to Prototype:
> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAFXMW906RJCQXui4UHUWukJwXS8kmHpthQFPRWnTkbhcR8D_XA%40mail.gmail.com
> Intent to Experiment:
> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAFXMW902YSWgaAjhvmJK%2BEwU8DMrW-j8j8MTsr1yKV7di%2Bs3-w%40mail.gmail.com
>
>
> This intent message was generated by Chrome Platform Status
> <https://chromestatus.com/>.
>

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